Possible Clues:

• Bill's partner will invest Republican capital?
• Capital southwest of Zurich
• Swiss Alpine Museum city
• Line one's taken from one European capital to another
• Second-most populous Swiss canton, after Zurich
• President Ueli Maurer's capital
• Canton that holds a capital
• 'Feel the ___' (Sanders slogan)
• Rubberneckers going round city
• Capital city of Europe